S.U.R.&R HL427 Heater Line Repair Kit Repair damaged heater lines including pinholes, cracks, kinks, and more Covers most common SAE and metric lines including 1/2", 5/8", 13mm and 16mm; 3/4" also available (sold separately) Make connections easily by hand; no specialty tools required OE style hose easy to route On-the-car repairs made simple